REAR-REAR AXLE DIFFERENTIAL - CONTINUED
ASSEMBLY - CONTINUED
Pinion gear bearing cones preload is established by choosing the correct size spacer that is located between the
bearings, and tightening the drive pinion nut. The spacer is available in different thicknesses to obtain correct
bearing preload. Steps 46 thru 48 outline the procedure for establishing correct bearing preload.
Bearing cage (1)
Yoke (3) a.
b. Put assembly in vise with soft jaws so
gear (2) is held tight.
Washer (4) and
Rotate cage (1) and, at the same time,
screw on nut (5) and tighen to 325 ft-lb
(441 N m) of torque using 1 7/8-inch
deep well socket and torque multiplier
wrench with 314-inch drive.
Be sure to turn cage while tightening
nut so bearing cones will line up and
seat. Bearing rollers mut be seated
against face of cone.
Pinion assembly (6)
Bearing cage (1)
Measure bearing preload by
strong cord or soft wire around cage (1)
and attaching free end to suitable spring
Turn cage (1) and at the same time,
pull on spring scale and note reading.
Scale reading should show 3-8 lb
(1.35 - 3.6 kg).
When preload does not agree with specification (3 - 8 lb, 1.35 - 3.6 kg), bearing load may be increased by installing
a thicker spacer. If necessary, go back to disassembly, steps 24 thru 29, to remove spacer. Measure thickness of
old spacer with micrometer and select a different spacer. Spacers are available in various thicknesses, in
gradustions of 0.001-inch (0.025-mm). Closer adjustment can be made by working spacer to desired thickness
using an emery cloth on flat surface. Be sure to clean off emery cuttings before installing spacer (steps 44 thru 46).
Two bearing caps (7)
Two bearing Check that rollers are in contact with
cone face using thickness gage ribbon.
There must be no clearance at ends of